Study on the production of metal matrix composite layer by laser melt injection technology

摘要

In-situ synthesized Al_2O_3 reinforced metal-ceramic composite coating was fabricated on low-alloyed carbon steel surface by laser cladding. Injection of the ceramic powder into the melted surface can be difficult due to the effect of surface tension and to the lower density of the Al_2O_3 particles, compared to that of the steel matrix. These difficulties can be avoided by the in-situ synthesis of Al_2O_3 particles in the liquid steel matrix. In this paper, the results of experiments performed by laser beam will be introduced, together with the interpretation of these results. Experiments proved that the Al_2O_3 ceramic phase can be created in-situ in the steel matrix.